Troubleshooting 4L60E transmissions

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-Basic details on troubleshooting 4L60E transmissions.
-==4L60-700r4-4L60E Drivability problems==
-Has the transmission lost reverse?  Has it also lost 2nd gear and 4th gear(over drive)?
-If that is the problems, I would suspect the drive shell has broken or stripped out splines.  When the drive shell fails, the results is no reverse, 2nd gear or 4th gear. Check for 3 complete shifts in forward gears. Shift 1 - 2nd gear, then shift 2 -3 gear, then shift to 4th gear (overdrive)
-==Scanner==
-A good quality scanner is needed.  Not a code reader device.  A scanner that can read codes, clear codes , can  read a live data stream as the trans is controlled by the PCM.
-Some scanners can take over control of the transmission for a better diagnostic test of the operation as the vehicle is driven
-[[Category:Transmission]]
-[[Category:Undeveloped articles]]
-[[Category:Troubleshooting]]

Latest revision as of 08:41, 14 April 2025